RTU-MT

Telemetry RTU for MV substations

Compact remote unit for status and variable supervision in medium-voltage substations.

  • 8 DI · 8 DO · 4 AI
  • RS232 · RS485 · Ethernet
  • LTE with 3G/2G fallback
Hardware Telemetry RTU for MV substations — RTU-MT

Supervising and switching a scattered MV substation, with no fiber or fixed connectivity, calls for a unit that doesn't depend on a single link. This RTU concentrates field inputs and outputs, speaks the protocols your SCADA already uses, and keeps communicating over Ethernet, serial or cellular, with its own battery if power is cut.

  • Real redundancy

    Ethernet, RS485/RS232 and LTE with 3G/2G fallback: if one link fails, the unit stays connected.

  • Speaks the protocol you already use

    Native DNP3.0, IEC 104 and MODBUS (TCP, RTU, ASCII), as slave or master, with no single-vendor lock-in.

  • Keeps operating without utility power

    Seventy-two hours of battery autonomy with automatic charging and testing, and an immediate SCADA alarm if something fails.

  • Configured without a site visit

    Remote or OTA configuration, with configuration export/import for fast deployment across many units.

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01Technical specifications

Technical specifications

  • Inputs and outputs

    • 8 dry-contact digital inputs, 3.5 kV isolation, up to 50 VDC (220 VDC on request)
    • 8 dry-contact relay digital outputs, 100 V / 0.4 A
    • 4 analog inputs, 4-20 mA or 0-5 VDC, configurable per channel
    • Controlled auxiliary output (VOUT) up to 500 mA for input scanning
    • Configurable database of up to 255 points per type (DI, DO, AI, AO, counters)

  • Communications

    • 2 RS232 ports, 1 RS485 port and 1 10/100 Mbps Ethernet port
    • LTE cellular connectivity with automatic 3G/2G fallback, dual SIM
    • Optional multi-constellation GPS for time synchronization and location
    • DNP3.0, IEC 60870-5-104 and MODBUS TCP as a slave toward the SCADA
    • MODBUS TCP, RTU and ASCII as a master toward field devices
    • Protocol gateway: concentrates and converts MODBUS to DNP3.0 or IEC 104
    • Transparent TCP bridges for each serial port
    • Remote or local configuration via web interface

  • Power and backup

    • Power supply 9 to 40 VDC, consumption 250 to 500 mA at 15 V
    • Integrated battery charger with automatic weekly test
    • 72-hour battery autonomy
    • Automatic alarm on battery failure, reported to the SCADA
    • Remote (OTA) or local USB firmware update

  • Mechanics and environment

    • Metal enclosure with powder coating, IP65 protection rating
    • Dimensions: 300 x 300 x 120 mm
    • Wall or pole mounting (accessory kit)
    • Operating temperature: -40°C to +85°C, non-condensing
    • Local-mode key switch to inhibit remote commands during maintenance

02Main applications

Main applications

  • Remote monitoring and control of breakers and switches in MV substations
  • Underground distribution networks with no fiber-optic infrastructure
  • OF cable pressure measurement via integrated sensors
  • Progressive migration from legacy MODBUS systems to DNP3.0 or IEC 104
  • Concentrating MODBUS field devices under a single SCADA link
  • Scattered or hard-to-reach substations, with battery and LTE backup

Solutions using it

Where it is deployed

03Other products

Other products

Need this unit, or a variant of it?

We adapt inputs, outputs, protocols and operating logic to the requirement. Tell us what you need to solve.

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